Before long the slant and lunge of his big body and his restless, powerful movements made his expensive clothes stretch and crumple until they molded themselves on him and began to resemble the Levi's he might once have worn on the range or the range; by the same process, in the surge and pound of his speeches, the elegant and disciplined vocabulary he had so laboriously acquired speeded up to a wild crackerbarrel whine or slowed down to a twanging, gunsmoke drawl.
Source: wiktionary